Mechanical Advantage

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J
• 1750 J
• 355 J
• 175 J

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?

• 120

• 5

• 2000

• 80

The amount by which a machine multiplies input force is known as the 

• work.
• power.
• output force.
• mechanical advantage.

All simple machines help make work _________.

• harder
• smaller
• lighter
• easier

What type of simple machine is shown here?

• Pulley
• Wheel and Axle
• Lever
• Wedge

The device used to raise a flag up a flag pole is an example of a 

• wheel and axle 
• lever
• inclined plane 
• pulley 

If the distance from the effort to the fulcrum is greater than the distance from the load to the fulcrum, then

• the effort has a mechanical advantage

• the lever has a mechanical advantage

• the fulcrum has a mechanical advantage

You push down on a lever with a force of 100 N to lift a 500 N box.

What is the input force?

• 100 N

• 500 N

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever (MA=Output Force/Input Force)?

• 1

• 10

• 100

• 1000